Odin Tutorial

Odin is a general-purpose, statically typed, compiled language created by Ginger Bill in 2016 for modern systems programming. It favours simplicity and orthogonality over cleverness: no hidden allocations, no method tables, no exceptions — just explicit data, explicit memory, and code you can read top to bottom.

Scope: Study the topics in order, compile every example with the Odin toolchain, and treat the language overview as the authority when this track and your compiler disagree.

Odin Study Progress

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#	ODIN	Topic	Description
PHASE 1: LANGUAGE FOUNDATIONS
	01	Why Odin & Design Philosophy	Origins, simplicity, data-oriented design, and what Odin refuses to hide.
	02	Toolchain & Environment	Install Odin, run a first program, and understand the build modes.
	03	Statements, Expressions & Comments	Identifiers, punctuation, operators, and source layout rules.
PHASE 2: TYPES & CONTROL
	04	Data Types & Values	Integers, floats, runes, booleans, distinct types, and inference.
	05	Operators & Expressions	Arithmetic, comparison, bitwise operators, and evaluation rules.
	06	Control Flow: if, when & switch	Runtime branching, compile-time `when`, and exhaustive `switch`.
	07	Loops & Iteration	The single `for` form, ranges, matrix iteration, and labels.
PHASE 3: COMPOSITION
	08	Procedures & Parameters	proc declarations, multiple results, defaults, and procedure values.
	09	Structs, Enums & Unions	Modelling data with struct, enum, bit_set, and `using` fields.
	10	Arrays, Slices & Dynamic Arrays	Fixed arrays, slices as views, and allocator-backed dynamic arrays.
	11	Maps & bit_set Sets	Hash maps, map iteration, and sets built from enum-backed bit sets.
PHASE 4: MEMORY & DATA-ORIENTED DESIGN
	12	Pointers & Memory Addressing	Address-of, dereferencing, multi-pointers, and raw memory.
	13	Allocators & the Context System	Explicit allocation, the implicit context, and custom allocators.
	14	Data-Oriented Design (SOA/AOS)	Record layout versus split arrays for cache-friendly hot loops.
PHASE 5: RELIABILITY & METAPROGRAMMING
	15	Errors, defer & or_return	Errors as values, deterministic cleanup, and propagation.
	16	Parametric Polymorphism	Procedures and structs parameterised by type, plus where clauses.
	17	Compile-time Programming	when blocks, intrinsics, and #+build conditional compilation.
	18	Packages & Collections	package main, imports, collections, and the core/vendor libraries.
PHASE 6: INTEROP & TOOLING
	19	Foreign Interface (C Interop)	foreign import, calling C, and sharing data across the boundary.
	20	Concurrency & Threading	core:thread, synchronisation primitives, and parallel work.
	21	Testing, Formatting & Debugging	odin test, assertions, formatting, and compiler diagnostics.
PHASE 7: PRACTICE & DEMO
	22	Lab Examples	Run and modify single-file practice demos for every lesson.
	23	Study Projects	Small composed programs that combine the whole language.
PHASE 8: REFERENCE
	24	References & Tooling	Playgrounds, official documentation, books, and sample repositories.

Credits: Lesson content drafted with DeepSeek via Fireworks AI. References: free tutorials below.

Free References

The full categorized table — online tooling, official documentation, and sample repositories — lives on the References & Tooling page. Start with these: